Note 10 - Commitments and Contingencies	9 Months Ended
Sep. 30, 2022
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	*Note 10.* Commitments and Contingencies Office Leases** We have long-term operating leases for office, industrial and laboratory space in Westminster, California, Oak Ridge, Tennessee, and Alberta, Canada. Payments made under operating leases are charged to the Consolidated Statement of Operations and Comprehensive Loss on a straight-line basis over the term of the operating lease agreement. For the nine months ended September 30, 2022 and 2021, rental expense was $228,000 and $170,000, respectively. As of September 30, 2022, our weighted average remaining lease term is nine years and the total remaining operating lease payments is $1,859,000. We have long-term operating leases for office, industrial and laboratory space in Westminster, California, Oak Ridge, Tennessee, and Alberta, Canada. Payments made under operating leases are charged to the Consolidated Statement of Operations and Comprehensive Loss on a straight-line basis over the term of the operating lease agreement. On January 1, 2019, we adopted ASC 842 which resulted in a right-of-use asset and lease liability. Short-term leases are not included in our analysis. The lease of our Westminster facility expires August 2024. It is too early for management to determine if it will exercise its option to extend the lease four years, therefore the four-year extension is not included in the analysis. In September 2022, the lease of our Oak Ridge, Tennessee facility was extended for ten years. The ten year lease added $443,000 to our right of use and lease liability on our September 30, 2022 balance sheet. The lease of our Canadian facility is less than one year. None of our leases have additional terms related to the payments or mechanics of the lease. The leases have no additional payment terms such as common area maintenance payments, tax sharing payments or other allocable expenses. Likewise, the leases do not contain other terms and conditions of use, such as variable lease payments, residual value guaranties or other restrictive financial terms. Since there is no explicit interest rate in our leases, management used its incremental borrowing rate, which is estimated to be 18% to determine lease liability.

Note 10 - Commitments and Contingencies

9 Months Ended

Sep. 30, 2022

Commitments and Contingencies Disclosure [Text Block]

Note 10. Commitments and Contingencies

Office Leases

We have long-term operating leases for office, industrial and laboratory space in Westminster, California, Oak Ridge, Tennessee, and Alberta, Canada. Payments made under operating leases are charged to the Consolidated Statement of Operations and Comprehensive Loss on a straight-line basis over the term of the operating lease agreement. On January 1, 2019, we adopted ASC 842 which resulted in a right-of-use asset and lease liability. Short-term leases are not included in our analysis. The lease of our Westminster facility expires August 2024. It is too early for management to determine if it will exercise its option to extend the lease four years, therefore the four-year extension is not included in the analysis. In September 2022, the lease of our Oak Ridge, Tennessee facility was extended for ten years. The ten year lease added $443,000 to our right of use and lease liability on our September 30, 2022 balance sheet. The lease of our Canadian facility is less than one year. None of our leases have additional terms related to the payments or mechanics of the lease. The leases have no additional payment terms such as common area maintenance payments, tax sharing payments or other allocable expenses. Likewise, the leases do not contain other terms and conditions of use, such as variable lease payments, residual value guaranties or other restrictive financial terms. Since there is no explicit interest rate in our leases, management used its incremental borrowing rate, which is estimated to be 18% to determine lease liability.